Toward a quantitative evaluation of Lewis acid strength. A 13CNMR study of the interaction of boron trifluoride with diethyl ether1Dedicated to the memory of Russell S. Drago.1

1999 ◽  
Vol 137 (1-3) ◽  
pp. 213-221 ◽  
Author(s):  
Dan Fǎrcaşiu ◽  
Povilas Lukinskas ◽  
Anca Ghenciu ◽  
Rebecca Martin
Author(s):  
Olivier Charles Gagné ◽  
Frank Christopher Hawthorne

New and updated Lewis acid strengths are listed for 135 cations bonded to oxygen for use with published Lewis base strengths. A strong correlation between Lewis acid strength and ionization energy is shown, and correlation with electronegativity is confirmed.


1961 ◽  
Vol 39 (6) ◽  
pp. 1184-1189 ◽  
Author(s):  
Denys Cook

The infrared spectra of 2,6-dimethyl-4-pyrone in solution, and in complexes with HgCl2, ZnCl2, BF3, SbCl5, and HBr have been recorded. A band at 1639 cm−1 in the free pyrone moves to progressively lower frequencies in the complexes as the Lewis acid strength increases, identifying this band as the carbonyl stretching frequency and the donor site as the carbonyl group. A higher-frequency band, at 1678 cm−1 in the free pyrone, moves to lower frequency on complex formation, but to a much smaller extent, and is to be identified with a stretching mode of the ring. The site of protonation in 2,6-dimethyl-4-pyrone salts has been unequivocally shown to be the carbonyl oxygen atom.


1990 ◽  
Vol 112 (9) ◽  
pp. 3401-3403 ◽  
Author(s):  
I. D. Brown ◽  
A. Skowron
Keyword(s):  

ChemInform ◽  
1990 ◽  
Vol 21 (33) ◽  
Author(s):  
I. D. BROWN ◽  
A. SKOWRON
Keyword(s):  

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